True, but the point is one of the twins would do the training and the other would not. That's the difference.

Yeah but the point is if the trained twin has been taught to Samba thinking it's a martial art, he's going to hospital. His bro, relying on his raw fighting skills might just, however, walk out of there.
It's the quality of the techniques you're using combined with being good at them, not just the fact that you're good at them so if your techniques are pants so are you.